Toytec superflex springs to give my saggy rear a 1.5-2" lift over level?

Well, I loaded up my 4Runner with 1300 lb, filled it with gas and took it out to test it. This is with new OME 2906 rear springs and Bilstein shocks all around with original stock front springs. First some local railroad tracks; too smooth, barely noticed them. Next a serious railroad crossing; I went over the hump at 35 mph and went slightly airborne; upon landing, the rear bounced several times, but no bottoming out.

Then to the speed bumps, it took the speed bumps very well (25 mph), hardly any different than a rough road. Then, I unloaded the weight and did it again empty. Going slightly airborne at the railroad crossing, it landed firmly but gently with no bounce. On to the speed bumps; with the empty vehicle speed bumps were the harshest of all, much more noticeable bump than with the loaded vehicle.

On the highway, the load was hardly noticable, but on long dips, there was a slight bouncing in the rear. With the vehicle loaded to GVWR, the ride height was 20 3/8 inches rear, 20 5/8 front; upon completion with the vehicle empty it was 22 1/8 rear, 20 7/8 front. So, about 1.75 inches drop in the rear with load, about 0.25 inch front; it looks like the rear has settled about 1/8 inch since the springs were first installed last month.
 
Well, I loaded up my 4Runner with 1300 lb, filled it with gas and took it out to test it. This is with new OME 2906 rear springs and Bilstein shocks all around with original stock front springs. First some local railroad tracks; too smooth, barely noticed them. Next a serious railroad crossing; I went over the hump at 35 mph and went slightly airborne; upon landing, the rear bounced several times, but no bottoming out.

Then to the speed bumps, it took the speed bumps very well (25 mph), hardly any different than a rough road. Then, I unloaded the weight and did it again empty. Going slightly airborne at the railroad crossing, it landed firmly but gently with no bounce. On to the speed bumps; with the empty vehicle speed bumps were the harshest of all, much more noticeable bump than with the loaded vehicle.

On the highway, the load was hardly noticable, but on long dips, there was a slight bouncing in the rear. With the vehicle loaded to GVWR, the ride height was 20 3/8 inches rear, 20 5/8 front; upon completion with the vehicle empty it was 22 1/8 rear, 20 7/8 front. So, about 1.75 inches drop in the rear with load, about 0.25 inch front; it looks like the rear has settled about 1/8 inch since the springs were first installed last month.
So after reading this comment is it safe to say that if you load down your new springs for a few weeks straight they will "set" quicker?

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Based on a statistical analysis of 1 out of 1, it appears to be true.
Haha alright, thanks. Btw I'm curious what that 1,300 lbs consisted of in your rig. I didn't think a 4runner could take that much.

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Toytec superflex springs to give my saggy rear a 1.5-2" lift over level?

Just to add another option-and possibly confusion- Toytec also makes a progressive 3" spring. The Superflex isn't the only option from Toytec.
I love my Superflex springs, but I don't do big camping/overland trips.
I've taken a few trips over the mountain, and my Superflex didn't sag more than 3/4-1" with 200lbs of dogs, and at least another 100lbs of bags/gear. I still had a nice rake.
I'm at 21 5/8" center of hub to fender front, and 23 1/2" rear with no weight. That's with Tundra 5100 on 3 of 5 with '99 tall coils, and Superflex rear with no coil isolator/center bump.
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Haha alright, thanks. Btw I'm curious what that 1,300 lbs consisted of in your rig. I didn't think a 4runner could take that much.

The GVWR is rated as 5250 lb; the curb weight is listed as 3975 lb, giving a payload of 1275 lb. maybe I was slightly overloaded. The payload was me and about 1120 lb of barbell iron. I balance it out with 400 lb in the front seats, 400 lb in the back seat, and 500 lb in the rear area, to represent 4 fairly large people and cargo or a trailer. I have loaded it to this level many times in real use. Usually concrete blocks or sacks of mortar and another passenger, and once 4 people, luggage and a trailer about a thousand miles and back, so testing it with a payload of 1300 lb is not unrealistic.

Before the OME 2906 springs, it really felt very overloaded. I have been planning to fix it for many years and finally got around to it. Now it is how I think a 4Runner should be.
 
The GVWR is rated as 5250 lb; the curb weight is listed as 3975 lb, giving a payload of 1275 lb. maybe I was slightly overloaded. The payload was me and about 1120 lb of barbell iron. I balance it out with 400 lb in the front seats, 400 lb in the back seat, and 500 lb in the rear area, to represent 4 fairly large people and cargo or a trailer. I have loaded it to this level many times in real use. Usually concrete blocks or sacks of mortar and another passenger, and once 4 people, luggage and a trailer about a thousand miles and back, so testing it with a payload of 1300 lb is not unrealistic.

Before the OME 2906 springs, it really felt very overloaded. I have been planning to fix it for many years and finally got around to it. Now it is how I think a 4Runner should be.
How's the ride empty and what kind of lift do those springs give you in the rear?

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How's the ride empty and what kind of lift do those springs give you in the rear?

The rear height is 22 1/8 inches from center of the wheel to fender. Yesterday's post has all the heights before and after mod, loaded and unloaded.

As for the ride empty, it is decidedly firmer than stock. It is very evident in taking off, stopping, and turning, and even climbing into the vehicle. I have been trying to evaluate the ride quality on various roads, and generally I can feel the road more, and my first impression was that the vehicle felt like it was glued to the road. In spite of feeling the road and bumps more, I believe it handles them very well and is not objectionable. Everybody is probably different in what they personally like. I thought it only got objectionable driving over 8 speed bumps in quick succession at 25 mph in a nearby parking lot.

Anyway, I really like the firmer ride; it is just what I had hoped for. I also like the ride height with a little rake--it keeps it fairly level with a substantial load.
 
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Here's the sleeping platform/cargo box. It probably weights about 100lbs total, maybe a little more or less (not quite sure) but it's all 3/4" birch, so maybe a little more. The front box is only for food and stove, and the cooler straps into the rear seat locks (dunno what to call them), so a lot of the weight is pushed to the rear.

As of right now, I'm going with the Superflex springs unless anyone says otherwise



F84AA2A7-3F65-479B-B05F-CC0FF548A38F.jpg~original

Do you have more pictures of your platform?
 

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